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1 706 jeremybenn
------------------------------------------------------------------------------
2
--                                                                          --
3
--                 GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS                 --
4
--                                                                          --
5
--                   S Y S T E M . O S _ I N T E R F A C E                  --
6
--                                                                          --
7
--                                  S p e c                                 --
8
--                                                                          --
9
--             Copyright (C) 1991-1994, Florida State University            --
10
--          Copyright (C) 1995-2011, Free Software Foundation, Inc.         --
11
--                                                                          --
12
-- GNAT is free software;  you can  redistribute it  and/or modify it under --
13
-- terms of the  GNU General Public License as published  by the Free Soft- --
14
-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
15
-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
16
-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
17
-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
18
--                                                                          --
19
-- As a special exception under Section 7 of GPL version 3, you are granted --
20
-- additional permissions described in the GCC Runtime Library Exception,   --
21
-- version 3.1, as published by the Free Software Foundation.               --
22
--                                                                          --
23
-- You should have received a copy of the GNU General Public License and    --
24
-- a copy of the GCC Runtime Library Exception along with this program;     --
25
-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
26
-- <http://www.gnu.org/licenses/>.                                          --
27
--                                                                          --
28
-- GNARL was developed by the GNARL team at Florida State University.       --
29
-- Extensive contributions were provided by Ada Core Technologies, Inc.     --
30
--                                                                          --
31
------------------------------------------------------------------------------
32
 
33
--  This is a AIX (Native THREADS) version of this package
34
 
35
--  This package encapsulates all direct interfaces to OS services that are
36
--  needed by the tasking run-time (libgnarl).
37
 
38
--  PLEASE DO NOT add any with-clauses to this package or remove the pragma
39
--  Preelaborate. This package is designed to be a bottom-level (leaf) package.
40
 
41
with Ada.Unchecked_Conversion;
42
 
43
with Interfaces.C;
44
 
45
package System.OS_Interface is
46
   pragma Preelaborate;
47
 
48
   pragma Linker_Options ("-pthread");
49
   --  This implies -lpthreads + other things depending on the GCC
50
   --  configuration, such as the selection of a proper libgcc variant
51
   --  for table-based exception handling when it is available.
52
 
53
   pragma Linker_Options ("-lc_r");
54
 
55
   subtype int            is Interfaces.C.int;
56
   subtype short          is Interfaces.C.short;
57
   subtype long           is Interfaces.C.long;
58
   subtype unsigned       is Interfaces.C.unsigned;
59
   subtype unsigned_short is Interfaces.C.unsigned_short;
60
   subtype unsigned_long  is Interfaces.C.unsigned_long;
61
   subtype unsigned_char  is Interfaces.C.unsigned_char;
62
   subtype plain_char     is Interfaces.C.plain_char;
63
   subtype size_t         is Interfaces.C.size_t;
64
 
65
   -----------
66
   -- Errno --
67
   -----------
68
 
69
   function errno return int;
70
   pragma Import (C, errno, "__get_errno");
71
 
72
   EAGAIN    : constant := 11;
73
   EINTR     : constant := 4;
74
   EINVAL    : constant := 22;
75
   ENOMEM    : constant := 12;
76
   ETIMEDOUT : constant := 78;
77
 
78
   -------------
79
   -- Signals --
80
   -------------
81
 
82
   Max_Interrupt : constant := 63;
83
   type Signal is new int range 0 .. Max_Interrupt;
84
   for Signal'Size use int'Size;
85
 
86
   SIGHUP      : constant := 1; --  hangup
87
   SIGINT      : constant := 2; --  interrupt (rubout)
88
   SIGQUIT     : constant := 3; --  quit (ASCD FS)
89
   SIGILL      : constant := 4; --  illegal instruction (not reset)
90
   SIGTRAP     : constant := 5; --  trace trap (not reset)
91
   SIGIOT      : constant := 6; --  IOT instruction
92
   SIGABRT     : constant := 6; --  used by abort, replace SIGIOT in the future
93
   SIGEMT      : constant := 7; --  EMT instruction
94
   SIGFPE      : constant := 8; --  floating point exception
95
   SIGKILL     : constant := 9; --  kill (cannot be caught or ignored)
96
   SIGBUS      : constant := 10; --  bus error
97
   SIGSEGV     : constant := 11; --  segmentation violation
98
   SIGSYS      : constant := 12; --  bad argument to system call
99
   SIGPIPE     : constant := 13; --  write on a pipe with no one to read it
100
   SIGALRM     : constant := 14; --  alarm clock
101
   SIGTERM     : constant := 15; --  software termination signal from kill
102
   SIGUSR1     : constant := 30; --  user defined signal 1
103
   SIGUSR2     : constant := 31; --  user defined signal 2
104
   SIGCLD      : constant := 20; --  alias for SIGCHLD
105
   SIGCHLD     : constant := 20; --  child status change
106
   SIGPWR      : constant := 29; --  power-fail restart
107
   SIGWINCH    : constant := 28; --  window size change
108
   SIGURG      : constant := 16; --  urgent condition on IO channel
109
   SIGPOLL     : constant := 23; --  pollable event occurred
110
   SIGIO       : constant := 23; --  I/O possible (Solaris SIGPOLL alias)
111
   SIGSTOP     : constant := 17; --  stop (cannot be caught or ignored)
112
   SIGTSTP     : constant := 18; --  user stop requested from tty
113
   SIGCONT     : constant := 19; --  stopped process has been continued
114
   SIGTTIN     : constant := 21; --  background tty read attempted
115
   SIGTTOU     : constant := 22; --  background tty write attempted
116
   SIGVTALRM   : constant := 34; --  virtual timer expired
117
   SIGPROF     : constant := 32; --  profiling timer expired
118
   SIGXCPU     : constant := 24; --  CPU time limit exceeded
119
   SIGXFSZ     : constant := 25; --  filesize limit exceeded
120
   SIGWAITING  : constant := 39; --  m:n scheduling
121
 
122
   --  The following signals are AIX specific
123
 
124
   SIGMSG      : constant := 27; -- input data is in the ring buffer
125
   SIGDANGER   : constant := 33; -- system crash imminent
126
   SIGMIGRATE  : constant := 35; -- migrate process
127
   SIGPRE      : constant := 36; -- programming exception
128
   SIGVIRT     : constant := 37; -- AIX virtual time alarm
129
   SIGALRM1    : constant := 38; -- m:n condition variables
130
   SIGCPUFAIL  : constant := 59; -- Predictive De-configuration of Processors
131
   SIGKAP      : constant := 60; -- keep alive poll from native keyboard
132
   SIGGRANT    : constant := SIGKAP; -- monitor mode granted
133
   SIGRETRACT  : constant := 61; -- monitor mode should be relinquished
134
   SIGSOUND    : constant := 62; -- sound control has completed
135
   SIGSAK      : constant := 63; -- secure attention key
136
 
137
   SIGADAABORT : constant := SIGEMT;
138
   --  Note: on other targets, we usually use SIGABRT, but on AIX, it appears
139
   --  that SIGABRT can't be used in sigwait(), so we use SIGEMT.
140
   --  SIGEMT is "Emulator Trap Instruction" from the PDP-11, and does not
141
   --  have a standardized usage.
142
 
143
   type Signal_Set is array (Natural range <>) of Signal;
144
 
145
   Unmasked : constant Signal_Set :=
146
                (SIGTRAP, SIGTTIN, SIGTTOU, SIGTSTP, SIGPROF);
147
   Reserved : constant Signal_Set :=
148
                (SIGABRT, SIGKILL, SIGSTOP, SIGALRM1, SIGWAITING, SIGCPUFAIL);
149
 
150
   type sigset_t is private;
151
 
152
   function sigaddset (set : access sigset_t; sig : Signal) return int;
153
   pragma Import (C, sigaddset, "sigaddset");
154
 
155
   function sigdelset (set : access sigset_t; sig : Signal) return int;
156
   pragma Import (C, sigdelset, "sigdelset");
157
 
158
   function sigfillset (set : access sigset_t) return int;
159
   pragma Import (C, sigfillset, "sigfillset");
160
 
161
   function sigismember (set : access sigset_t; sig : Signal) return int;
162
   pragma Import (C, sigismember, "sigismember");
163
 
164
   function sigemptyset (set : access sigset_t) return int;
165
   pragma Import (C, sigemptyset, "sigemptyset");
166
 
167
   type struct_sigaction is record
168
      sa_handler : System.Address;
169
      sa_mask    : sigset_t;
170
      sa_flags   : int;
171
   end record;
172
   pragma Convention (C, struct_sigaction);
173
   type struct_sigaction_ptr is access all struct_sigaction;
174
 
175
   SA_SIGINFO : constant := 16#0100#;
176
   SA_ONSTACK : constant := 16#0001#;
177
 
178
   SIG_BLOCK   : constant := 0;
179
   SIG_UNBLOCK : constant := 1;
180
   SIG_SETMASK : constant := 2;
181
 
182
   SIG_DFL : constant := 0;
183
   SIG_IGN : constant := 1;
184
 
185
   function sigaction
186
     (sig  : Signal;
187
      act  : struct_sigaction_ptr;
188
      oact : struct_sigaction_ptr) return int;
189
   pragma Import (C, sigaction, "sigaction");
190
 
191
   ----------
192
   -- Time --
193
   ----------
194
 
195
   Time_Slice_Supported : constant Boolean := True;
196
   --  Indicates whether time slicing is supported
197
 
198
   type timespec is private;
199
 
200
   type clockid_t is new int;
201
 
202
   function clock_gettime
203
     (clock_id : clockid_t;
204
      tp       : access timespec) return int;
205
 
206
   function To_Duration (TS : timespec) return Duration;
207
   pragma Inline (To_Duration);
208
 
209
   function To_Timespec (D : Duration) return timespec;
210
   pragma Inline (To_Timespec);
211
 
212
   type struct_timezone is record
213
      tz_minuteswest : int;
214
      tz_dsttime     : int;
215
   end record;
216
   pragma Convention (C, struct_timezone);
217
   type struct_timezone_ptr is access all struct_timezone;
218
 
219
   -------------------------
220
   -- Priority Scheduling --
221
   -------------------------
222
 
223
   SCHED_FIFO  : constant := 1;
224
   SCHED_RR    : constant := 2;
225
   SCHED_OTHER : constant := 0;
226
 
227
   function To_Target_Priority
228
     (Prio : System.Any_Priority) return Interfaces.C.int;
229
   --  Maps System.Any_Priority to a POSIX priority
230
 
231
   -------------
232
   -- Process --
233
   -------------
234
 
235
   type pid_t is private;
236
 
237
   function kill (pid : pid_t; sig : Signal) return int;
238
   pragma Import (C, kill, "kill");
239
 
240
   function getpid return pid_t;
241
   pragma Import (C, getpid, "getpid");
242
 
243
   ---------
244
   -- LWP --
245
   ---------
246
 
247
   function lwp_self return System.Address;
248
   pragma Import (C, lwp_self, "thread_self");
249
 
250
   -------------
251
   -- Threads --
252
   -------------
253
 
254
   type Thread_Body is access
255
     function (arg : System.Address) return System.Address;
256
   pragma Convention (C, Thread_Body);
257
 
258
   function Thread_Body_Access is new
259
     Ada.Unchecked_Conversion (System.Address, Thread_Body);
260
 
261
   type pthread_t           is private;
262
   subtype Thread_Id        is pthread_t;
263
 
264
   type pthread_mutex_t     is limited private;
265
   type pthread_cond_t      is limited private;
266
   type pthread_attr_t      is limited private;
267
   type pthread_mutexattr_t is limited private;
268
   type pthread_condattr_t  is limited private;
269
   type pthread_key_t       is private;
270
 
271
   PTHREAD_CREATE_DETACHED : constant := 1;
272
 
273
   PTHREAD_SCOPE_PROCESS : constant := 1;
274
   PTHREAD_SCOPE_SYSTEM  : constant := 0;
275
 
276
   --  Read/Write lock not supported on AIX. To add support both types
277
   --  pthread_rwlock_t and pthread_rwlockattr_t must properly be defined
278
   --  with the associated routines pthread_rwlock_[init/destroy] and
279
   --  pthread_rwlock_[rdlock/wrlock/unlock].
280
 
281
   subtype pthread_rwlock_t     is pthread_mutex_t;
282
   subtype pthread_rwlockattr_t is pthread_mutexattr_t;
283
 
284
   -----------
285
   -- Stack --
286
   -----------
287
 
288
   type stack_t is record
289
      ss_sp    : System.Address;
290
      ss_size  : size_t;
291
      ss_flags : int;
292
   end record;
293
   pragma Convention (C, stack_t);
294
 
295
   function sigaltstack
296
     (ss  : not null access stack_t;
297
      oss : access stack_t) return int;
298
   pragma Import (C, sigaltstack, "sigaltstack");
299
 
300
   Alternate_Stack : aliased System.Address;
301
   --  This is a dummy definition, never used (Alternate_Stack_Size is null)
302
 
303
   Alternate_Stack_Size : constant := 0;
304
   --  No alternate signal stack is used on this platform
305
 
306
   Stack_Base_Available : constant Boolean := False;
307
   --  Indicates whether the stack base is available on this target
308
 
309
   function Get_Stack_Base (thread : pthread_t) return Address;
310
   pragma Inline (Get_Stack_Base);
311
   --  Returns the stack base of the specified thread. Only call this function
312
   --  when Stack_Base_Available is True.
313
 
314
   function Get_Page_Size return size_t;
315
   function Get_Page_Size return Address;
316
   pragma Import (C, Get_Page_Size, "getpagesize");
317
   --  Returns the size of a page
318
 
319
   PROT_NONE  : constant := 0;
320
   PROT_READ  : constant := 1;
321
   PROT_WRITE : constant := 2;
322
   PROT_EXEC  : constant := 4;
323
   PROT_ALL   : constant := PROT_READ + PROT_WRITE + PROT_EXEC;
324
   PROT_ON    : constant := PROT_READ;
325
   PROT_OFF   : constant := PROT_ALL;
326
 
327
   function mprotect (addr : Address; len : size_t; prot : int) return int;
328
   pragma Import (C, mprotect);
329
 
330
   ---------------------------------------
331
   -- Nonstandard Thread Initialization --
332
   ---------------------------------------
333
 
334
   --  Though not documented, pthread_init *must* be called before any other
335
   --  pthread call.
336
 
337
   procedure pthread_init;
338
   pragma Import (C, pthread_init, "pthread_init");
339
 
340
   -------------------------
341
   -- POSIX.1c  Section 3 --
342
   -------------------------
343
 
344
   function sigwait
345
     (set : access sigset_t;
346
      sig : access Signal) return int;
347
   pragma Import (C, sigwait, "sigwait");
348
 
349
   function pthread_kill
350
     (thread : pthread_t;
351
      sig    : Signal) return int;
352
   pragma Import (C, pthread_kill, "pthread_kill");
353
 
354
   function pthread_sigmask
355
     (how  : int;
356
      set  : access sigset_t;
357
      oset : access sigset_t) return int;
358
   pragma Import (C, pthread_sigmask, "sigthreadmask");
359
 
360
   --------------------------
361
   -- POSIX.1c  Section 11 --
362
   --------------------------
363
 
364
   function pthread_mutexattr_init
365
     (attr : access pthread_mutexattr_t) return int;
366
   pragma Import (C, pthread_mutexattr_init, "pthread_mutexattr_init");
367
 
368
   function pthread_mutexattr_destroy
369
     (attr : access pthread_mutexattr_t) return int;
370
   pragma Import (C, pthread_mutexattr_destroy, "pthread_mutexattr_destroy");
371
 
372
   function pthread_mutex_init
373
     (mutex : access pthread_mutex_t;
374
      attr  : access pthread_mutexattr_t) return int;
375
   pragma Import (C, pthread_mutex_init, "pthread_mutex_init");
376
 
377
   function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
378
   pragma Import (C, pthread_mutex_destroy, "pthread_mutex_destroy");
379
 
380
   function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
381
   pragma Import (C, pthread_mutex_lock, "pthread_mutex_lock");
382
 
383
   function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
384
   pragma Import (C, pthread_mutex_unlock, "pthread_mutex_unlock");
385
 
386
   function pthread_condattr_init
387
     (attr : access pthread_condattr_t) return int;
388
   pragma Import (C, pthread_condattr_init, "pthread_condattr_init");
389
 
390
   function pthread_condattr_destroy
391
     (attr : access pthread_condattr_t) return int;
392
   pragma Import (C, pthread_condattr_destroy, "pthread_condattr_destroy");
393
 
394
   function pthread_cond_init
395
     (cond : access pthread_cond_t;
396
      attr : access pthread_condattr_t) return int;
397
   pragma Import (C, pthread_cond_init, "pthread_cond_init");
398
 
399
   function pthread_cond_destroy (cond : access pthread_cond_t) return int;
400
   pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy");
401
 
402
   function pthread_cond_signal (cond : access pthread_cond_t) return int;
403
   pragma Import (C, pthread_cond_signal, "pthread_cond_signal");
404
 
405
   function pthread_cond_wait
406
     (cond  : access pthread_cond_t;
407
      mutex : access pthread_mutex_t) return int;
408
   pragma Import (C, pthread_cond_wait, "pthread_cond_wait");
409
 
410
   function pthread_cond_timedwait
411
     (cond    : access pthread_cond_t;
412
      mutex   : access pthread_mutex_t;
413
      abstime : access timespec) return int;
414
   pragma Import (C, pthread_cond_timedwait, "pthread_cond_timedwait");
415
 
416
   Relative_Timed_Wait : constant Boolean := False;
417
   --  pthread_cond_timedwait requires an absolute delay time
418
 
419
   --------------------------
420
   -- POSIX.1c  Section 13 --
421
   --------------------------
422
 
423
   PTHREAD_PRIO_PROTECT : constant := 2;
424
 
425
   function PTHREAD_PRIO_INHERIT return int;
426
   --  Return value of C macro PTHREAD_PRIO_INHERIT. This function is needed
427
   --  since the value is different between AIX versions.
428
 
429
   function pthread_mutexattr_setprotocol
430
     (attr     : access pthread_mutexattr_t;
431
      protocol : int) return int;
432
   pragma Import (C, pthread_mutexattr_setprotocol);
433
 
434
   function pthread_mutexattr_setprioceiling
435
     (attr        : access pthread_mutexattr_t;
436
      prioceiling : int) return int;
437
   pragma Import (C, pthread_mutexattr_setprioceiling);
438
 
439
   type Array_5_Int is array (0 .. 5) of int;
440
   type struct_sched_param is record
441
      sched_priority : int;
442
      sched_policy   : int;
443
      sched_reserved : Array_5_Int;
444
   end record;
445
 
446
   function pthread_setschedparam
447
     (thread : pthread_t;
448
      policy : int;
449
      param  : access struct_sched_param) return int;
450
   pragma Import (C, pthread_setschedparam, "pthread_setschedparam");
451
 
452
   function pthread_attr_setscope
453
     (attr            : access pthread_attr_t;
454
      contentionscope : int) return int;
455
   pragma Import (C, pthread_attr_setscope, "pthread_attr_setscope");
456
 
457
   function pthread_attr_setinheritsched
458
     (attr            : access pthread_attr_t;
459
      inheritsched : int) return int;
460
   pragma Import (C, pthread_attr_setinheritsched);
461
 
462
   function pthread_attr_setschedpolicy
463
     (attr   : access pthread_attr_t;
464
      policy : int) return int;
465
   pragma Import (C, pthread_attr_setschedpolicy);
466
 
467
   function pthread_attr_setschedparam
468
     (attr        : access pthread_attr_t;
469
      sched_param : int) return int;
470
   pragma Import (C, pthread_attr_setschedparam);
471
 
472
   function sched_yield return int;
473
   --  AIX have a nonstandard sched_yield
474
 
475
   --------------------------
476
   -- P1003.1c  Section 16 --
477
   --------------------------
478
 
479
   function pthread_attr_init (attributes : access pthread_attr_t) return int;
480
   pragma Import (C, pthread_attr_init, "pthread_attr_init");
481
 
482
   function pthread_attr_destroy
483
     (attributes : access pthread_attr_t) return int;
484
   pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy");
485
 
486
   function pthread_attr_setdetachstate
487
     (attr        : access pthread_attr_t;
488
      detachstate : int) return int;
489
   pragma Import (C, pthread_attr_setdetachstate);
490
 
491
   function pthread_attr_setstacksize
492
     (attr      : access pthread_attr_t;
493
      stacksize : size_t) return int;
494
   pragma Import (C, pthread_attr_setstacksize);
495
 
496
   function pthread_create
497
     (thread        : access pthread_t;
498
      attributes    : access pthread_attr_t;
499
      start_routine : Thread_Body;
500
      arg           : System.Address)
501
     return int;
502
   pragma Import (C, pthread_create, "pthread_create");
503
 
504
   procedure pthread_exit (status : System.Address);
505
   pragma Import (C, pthread_exit, "pthread_exit");
506
 
507
   function pthread_self return pthread_t;
508
   pragma Import (C, pthread_self, "pthread_self");
509
 
510
   --------------------------
511
   -- POSIX.1c  Section 17 --
512
   --------------------------
513
 
514
   function pthread_setspecific
515
     (key   : pthread_key_t;
516
      value : System.Address) return int;
517
   pragma Import (C, pthread_setspecific, "pthread_setspecific");
518
 
519
   function pthread_getspecific (key : pthread_key_t) return System.Address;
520
   pragma Import (C, pthread_getspecific, "pthread_getspecific");
521
 
522
   type destructor_pointer is access procedure (arg : System.Address);
523
   pragma Convention (C, destructor_pointer);
524
 
525
   function pthread_key_create
526
     (key        : access pthread_key_t;
527
      destructor : destructor_pointer) return int;
528
   pragma Import (C, pthread_key_create, "pthread_key_create");
529
 
530
private
531
   type sigset_t is record
532
      losigs : unsigned_long;
533
      hisigs : unsigned_long;
534
   end record;
535
   pragma Convention (C_Pass_By_Copy, sigset_t);
536
 
537
   type pid_t is new int;
538
 
539
   type time_t is new long;
540
 
541
   type timespec is record
542
      tv_sec  : time_t;
543
      tv_nsec : long;
544
   end record;
545
   pragma Convention (C, timespec);
546
 
547
   type pthread_attr_t is new System.Address;
548
   pragma Convention (C, pthread_attr_t);
549
   --  typedef struct __pt_attr        *pthread_attr_t;
550
 
551
   type pthread_condattr_t is new System.Address;
552
   pragma Convention (C, pthread_condattr_t);
553
   --  typedef struct __pt_attr        *pthread_condattr_t;
554
 
555
   type pthread_mutexattr_t is new System.Address;
556
   pragma Convention (C, pthread_mutexattr_t);
557
   --  typedef struct __pt_attr        *pthread_mutexattr_t;
558
 
559
   type pthread_t is new System.Address;
560
   pragma Convention (C, pthread_t);
561
   --  typedef void    *pthread_t;
562
 
563
   type ptq_queue;
564
   type ptq_queue_ptr is access all ptq_queue;
565
 
566
   type ptq_queue is record
567
      ptq_next : ptq_queue_ptr;
568
      ptq_prev : ptq_queue_ptr;
569
   end record;
570
 
571
   type Array_3_Int is array (0 .. 3) of int;
572
   type pthread_mutex_t is record
573
        link        : ptq_queue;
574
        ptmtx_lock  : int;
575
        ptmtx_flags : long;
576
        protocol    : int;
577
        prioceiling : int;
578
        ptmtx_owner : pthread_t;
579
        mtx_id      : int;
580
        attr        : pthread_attr_t;
581
        mtx_kind    : int;
582
        lock_cpt    : int;
583
        reserved    : Array_3_Int;
584
   end record;
585
   pragma Convention (C, pthread_mutex_t);
586
   type pthread_mutex_t_ptr is access pthread_mutex_t;
587
 
588
   type pthread_cond_t is record
589
      link         : ptq_queue;
590
      ptcv_lock    : int;
591
      ptcv_flags   : long;
592
      ptcv_waiters : ptq_queue;
593
      cv_id        : int;
594
      attr         : pthread_attr_t;
595
      mutex        : pthread_mutex_t_ptr;
596
      cptwait      : int;
597
      reserved     : int;
598
   end record;
599
   pragma Convention (C, pthread_cond_t);
600
 
601
   type pthread_key_t is new unsigned;
602
 
603
end System.OS_Interface;

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